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Add gRPC-Web Blazor example (#718)
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‎build/dependencies.props‎

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<GrpcDotNetPackageVersion>2.25.0</GrpcDotNetPackageVersion> <!-- Only use for example projects -->
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<GrpcPackageVersion>2.27.0-dev202001131222</GrpcPackageVersion>
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<MicrosoftAspNetCorePackageVersion>3.0.0</MicrosoftAspNetCorePackageVersion>
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<MicrosoftAspNetCoreBlazorPackageVersion>3.1.0-preview4.19579.2</MicrosoftAspNetCoreBlazorPackageVersion>
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<MicrosoftBuildLocatorPackageVersion>1.2.2</MicrosoftBuildLocatorPackageVersion>
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<MicrosoftBuildPackageVersion>16.0.461</MicrosoftBuildPackageVersion>
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<MicrosoftCodeAnalysisFxCopAnalyzersPackageVersion>2.9.4</MicrosoftCodeAnalysisFxCopAnalyzersPackageVersion>

‎build_and_test.sh‎

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for example_solution in "${example_solutions[@]}"
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do
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# dotnet build uses msbuild, and attempts to speed consecutive builds by reusing processes.
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# This can become a problem when multiple versions of Grpc.Tools are used between builds.
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# The different versions will conflict. Shutdown build processes between builds to avoid conflicts.
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# Will be fixed in msbuild 16.5 - https://github.com/microsoft/msbuild/issues/1754
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dotnet build-server shutdown
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dotnet build $example_solution -c Release
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done
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‎examples/Blazor/Blazor.sln‎

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Microsoft Visual Studio Solution File, Format Version 12.00
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# Visual Studio Version 16
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VisualStudioVersion = 16.0.29521.150
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MinimumVisualStudioVersion = 10.0.40219.1
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Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Client", "Client\Client.csproj", "{B22D0F2E-D67A-413E-9450-4B64A60B56EF}"
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EndProject
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Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Server", "Server\Server.csproj", "{09CAF21C-D7D8-478C-9E74-3678DF615B8F}"
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EndProject
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Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Grpc.Net.Client.Web", "..\..\src\Grpc.Net.Client.Web\Grpc.Net.Client.Web.csproj", "{FDE80D13-B93B-421E-A67C-23C28EE19F52}"
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EndProject
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Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Grpc.AspNetCore.Web", "..\..\src\Grpc.AspNetCore.Web\Grpc.AspNetCore.Web.csproj", "{72824FA1-8041-4252-9230-92208FA7C749}"
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EndProject
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Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Grpc.Net.Client", "..\..\src\Grpc.Net.Client\Grpc.Net.Client.csproj", "{2EAB3743-10DD-44F5-9D25-04BDEB0C3BEC}"
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EndProject
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Global
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GlobalSection(SolutionConfigurationPlatforms) = preSolution
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Debug|Any CPU = Debug|Any CPU
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Release|Any CPU = Release|Any CPU
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EndGlobalSection
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GlobalSection(ProjectConfigurationPlatforms) = postSolution
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{B22D0F2E-D67A-413E-9450-4B64A60B56EF}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
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{B22D0F2E-D67A-413E-9450-4B64A60B56EF}.Debug|Any CPU.Build.0 = Debug|Any CPU
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{B22D0F2E-D67A-413E-9450-4B64A60B56EF}.Release|Any CPU.ActiveCfg = Release|Any CPU
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{B22D0F2E-D67A-413E-9450-4B64A60B56EF}.Release|Any CPU.Build.0 = Release|Any CPU
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{09CAF21C-D7D8-478C-9E74-3678DF615B8F}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
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{09CAF21C-D7D8-478C-9E74-3678DF615B8F}.Debug|Any CPU.Build.0 = Debug|Any CPU
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{09CAF21C-D7D8-478C-9E74-3678DF615B8F}.Release|Any CPU.ActiveCfg = Release|Any CPU
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{09CAF21C-D7D8-478C-9E74-3678DF615B8F}.Release|Any CPU.Build.0 = Release|Any CPU
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{FDE80D13-B93B-421E-A67C-23C28EE19F52}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
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{FDE80D13-B93B-421E-A67C-23C28EE19F52}.Debug|Any CPU.Build.0 = Debug|Any CPU
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{FDE80D13-B93B-421E-A67C-23C28EE19F52}.Release|Any CPU.ActiveCfg = Release|Any CPU
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{FDE80D13-B93B-421E-A67C-23C28EE19F52}.Release|Any CPU.Build.0 = Release|Any CPU
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{72824FA1-8041-4252-9230-92208FA7C749}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
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{72824FA1-8041-4252-9230-92208FA7C749}.Debug|Any CPU.Build.0 = Debug|Any CPU
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{72824FA1-8041-4252-9230-92208FA7C749}.Release|Any CPU.ActiveCfg = Release|Any CPU
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{72824FA1-8041-4252-9230-92208FA7C749}.Release|Any CPU.Build.0 = Release|Any CPU
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{2EAB3743-10DD-44F5-9D25-04BDEB0C3BEC}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
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{2EAB3743-10DD-44F5-9D25-04BDEB0C3BEC}.Debug|Any CPU.Build.0 = Debug|Any CPU
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{2EAB3743-10DD-44F5-9D25-04BDEB0C3BEC}.Release|Any CPU.ActiveCfg = Release|Any CPU
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{2EAB3743-10DD-44F5-9D25-04BDEB0C3BEC}.Release|Any CPU.Build.0 = Release|Any CPU
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EndGlobalSection
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GlobalSection(SolutionProperties) = preSolution
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HideSolutionNode = FALSE
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EndGlobalSection
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GlobalSection(ExtensibilityGlobals) = postSolution
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SolutionGuid = {95736335-0C8B-4FDA-8722-E08046339B83}
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EndGlobalSection
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EndGlobal

‎examples/Blazor/Client/App.razor‎

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<Router AppAssembly="@typeof(Program).Assembly">
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<Found Context="routeData">
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<RouteView RouteData="@routeData" DefaultLayout="@typeof(MainLayout)" />
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</Found>
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<NotFound>
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<LayoutView Layout="@typeof(MainLayout)">
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<p>Sorry, there's nothing at this address.</p>
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</LayoutView>
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</NotFound>
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</Router>

‎examples/Blazor/Client/Client.csproj‎

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<Project Sdk="Microsoft.NET.Sdk.Web">
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<PropertyGroup>
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<TargetFramework>netstandard2.1</TargetFramework>
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<RazorLangVersion>3.0</RazorLangVersion>
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</PropertyGroup>
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<ItemGroup>
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<PackageReference Include="Microsoft.AspNetCore.Blazor" Version="$(MicrosoftAspNetCoreBlazorPackageVersion)" />
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<PackageReference Include="Microsoft.AspNetCore.Blazor.Build" Version="$(MicrosoftAspNetCoreBlazorPackageVersion)" PrivateAssets="all" />
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<PackageReference Include="Microsoft.AspNetCore.Blazor.HttpClient" Version="$(MicrosoftAspNetCoreBlazorPackageVersion)" />
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<PackageReference Include="Microsoft.AspNetCore.Blazor.DevServer" Version="$(MicrosoftAspNetCoreBlazorPackageVersion)" PrivateAssets="all" />
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<PackageReference Include="Google.Protobuf" Version="$(GoogleProtobufPackageVersion)" />
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<PackageReference Include="Grpc.Tools" Version="$(GrpcPackageVersion)" PrivateAssets="All" />
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<Protobuf Include="..\Proto\weather.proto" GrpcServices="Client" Link="Protos\weather.proto" Access="Internal" />
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<ProjectReference Include="..\..\..\src\Grpc.Net.Client.Web\Grpc.Net.Client.Web.csproj" />
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<!-- Changes in Grpc.Net.Client are not on NuGet yet. Reference latest source from project -->
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<ProjectReference Include="..\..\..\src\Grpc.Net.Client\Grpc.Net.Client.csproj" />
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</ItemGroup>
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</Project>

‎examples/Blazor/Client/Messages/WeatherForecast.cs‎

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#region Copyright notice and license
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// Copyright 2019 The gRPC Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#endregion
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using System;
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using Google.Protobuf.WellKnownTypes;
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namespace Weather
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{
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// Properties for the underlying data are generated from the .proto file
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// This partial class just adds some extra convenience properties
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internal partial class WeatherForecast
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{
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public DateTime DateTime
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{
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get => Date.ToDateTime();
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set { Date = Timestamp.FromDateTime(value.ToUniversalTime()); }
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}
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public int TemperatureF => 32 + (int)(TemperatureC / 0.5556);
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}
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}

‎examples/Blazor/Client/Pages/Counter.razor‎

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@page "/counter"
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<h1>Counter</h1>
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<p>Current count: @currentCount</p>
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<button class="btn btn-primary" @onclick="IncrementCount">Click me</button>
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@code {
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private int currentCount = 0;
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private void IncrementCount()
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{
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currentCount++;
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}
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}

‎examples/Blazor/Client/Pages/FetchData.razor‎

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@page "/fetchdata"
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@inject WeatherForecasts.WeatherForecastsClient WeatherForecastsClient
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@using Google.Protobuf.WellKnownTypes
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<h1>Weather forecast</h1>
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<p>This component demonstrates fetching data from the server.</p>
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@if (forecasts == null)
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{
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<p><em>Loading...</em></p>
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}
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else
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{
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<table class="table">
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<thead>
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<tr>
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<th>Date</th>
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<th>Temp. (C)</th>
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<th>Temp. (F)</th>
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<th>Summary</th>
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</tr>
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</thead>
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<tbody>
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@foreach (var forecast in forecasts)
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{
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<tr>
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<td>@forecast.DateTime.ToShortDateString()</td>
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<td>@forecast.TemperatureC</td>
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<td>@forecast.TemperatureF</td>
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<td>@forecast.Summary</td>
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</tr>
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}
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</tbody>
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</table>
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}
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<img src="/grpc-logo.png" alt="gRPC logo" />
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@code {
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private IList<WeatherForecast>? forecasts;
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protected override async Task OnInitializedAsync()
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{
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forecasts = (await WeatherForecastsClient.GetWeatherForecastsAsync(new Empty())).Forecasts;
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}
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}

‎examples/Blazor/Client/Pages/Index.razor‎

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@page "/"
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<h1>Hello, world!</h1>
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Welcome to your new app.
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<SurveyPrompt Title="How is Blazor working for you?" />

‎examples/Blazor/Client/Program.cs‎

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#region Copyright notice and license
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// Copyright 2019 The gRPC Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#endregion
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using Microsoft.AspNetCore.Blazor.Hosting;
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namespace Client
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{
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public class Program
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{
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public static void Main(string[] args)
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{
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CreateHostBuilder(args).Build().Run();
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}
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public static IWebAssemblyHostBuilder CreateHostBuilder(string[] args) =>
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BlazorWebAssemblyHost.CreateDefaultBuilder()
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.UseBlazorStartup<Startup>();
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}
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}

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